Adjustable-scale sight for firearms.



E. s. PALMER.

ADJUSTABLE SCALE SIGHT FOR FIREARMS.

APPLICATION FILED SEPT. 21, 191B- 1,288,666, Patented Dec. 24,1918.

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FFICE.

ERIK S. PALMER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T0 WINCHESTER IREPEATING ARMS 00., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

ADJUSTABLE-SCALE SIGHT FOR FIREARMS.

To all whom it may concern:

Be it known that I, ERIK S. PALMER, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Adjustable- Scale Sights for Firearms; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-- Figure 1 a view in rear elevation of an adjustable-scale sight embodying my invention.

Fig.2 a view thereof vin side elevation.

Fig. 3 a plan view thereof.

Fig. 4 a broken view thereof in vertical longitudinal section on the line 44 of Fig. 3.

Fig. 5 a rear view of the sight-base with the slide removed.

Fig. 6 a view in horizontal section on the line 6-6 of Fig. 1.

My invention relates to an improved adjustable-scale sight for firearms, the object being to produce a simple, compact and convenient sight of the character described, with particular reference to its adaptation to be applied to the receiver of the arm so as to provide clearance for the bolt.

With these ends in view, my invention consists in an adjustable-scale sight for firearms, having certain details of construction as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ a yoke-shaped sight-base comprising a body 7 and two parallel forwardly extending arms 8 formed at their forward ends with screw-holes 9 for the reception of screws by which they are fastened to the side walls of the receiver of an ordinary firearm, the main portion of the space 10 between the arms providing clearance for the bolt on its rearward excursion. The rear face of the body 7 of the base is formed with a horizontal dovetail rib 11 entering a dovetail groove 12 in the forward face of a horizontally movable head 13. For the horizontal or windage adjustment of this head, I employ a windage screw 14 provided at its right hand end with a Specification of Letters Patent.

Patented Dec. 24, 1918.

Application filed September 21, 1918. Serial No. 255,061.

knurled button 15 and mounted in a perforated lug 16 formed integral with the right hand end of the head. A collar 17 mounted upon the right hand end of the screw and bearing against the lug l6 prevents the screw from pulling out. The opposite or left hand end of the screw enters a threaded lug 18 offsetting from the left hand end of the slide 13. Under this construction, the turning of the screw 14 by its knurled button 15 adjusts the head 13 to the right or left with respect to the body 7 of the sight-base.

The rear face of the head is formed with a centrally arranged, vertical, undercut groove 19 receiving a dovetailed elevation or cup-carrying stem 20 the lower end of which merges into an elevation-screw 21 passing downward through an integral lug 22 depending from the slide 13, this lug having a horizontal slot 23 for the reception of a knurled nut 24 through which the screw passes and which provides for the vertical adjustment of the stem 20 the upper end of which projects above the upper edge of the slide 13 and carries a removable sight-cup 25 having the usual sight-hole 26, the cup forming the peep-sight.

For gaging the windage, I employ an adjustable scale 27, superimposed directly upon the top of the slide 13 and having its beveled and graduated forward edge in alinement with the forward edge thereof, so that its graduations may be read in conjunction with an index-mark 28 in the center of the upper edge of the body 7 of the sight-base. The said scale 27 is held in place by set screws 29 passing through slots 30 formed in it and providing for its lateral adjustment with respect to the longitudinal axis of the sight structure.

For gaging the elevation, I employ a verically adjustable scale 31 applied to the right hand end of the rear face of the slide 13 and having its inner edge beveled and graduated to cooperate with an index-mark 33 upon the left hand edge of the elevation stem 20. The scale 31 is secured in place by a set-screw 32 passing through a vertical slot formed in it and permitting it to be vertically adjusted as called for. For the accommodation of the windage screw 14, the rib 11 is formed with a groove 35 and the forward face of the slide with a complementary groove 36 as clearly shown in Fig. 4.

In using my improved adjustable-scale sight, the same is applied to the receiver of a firearm which is then fired at a bulls eye placed at any one of the ranges for which the sight is graduated, but preferably for the shortest range, the elevation and windage screws being adjusted from time to time as found necessary to bring the sightcup into the position required for hitting the bulls eye at the range chosen. When the sight has in this manner been adjusted to hit the bulls eye, the set screws 29 and 32 are loosened, and the adjustable scales 27 and 31 are adjusted so that the proper graduations stand opposite the index marks 28 and 33, after which the set screws 29 and 32 are tightened so as to clamp the scales 27 and 81 in place. By this cycle of operations, the sight has been adjusted to meet the specific equations presented by the individual marksman. The sight having been thus adjusted, will be used in the same manner as the ordinary sight, theknurled button 15 and the knurled nut 24: being turned as required to adjust the sight to different conditions of wind and to different ranges.

I claim:

1. An adjustable-scale sight for firearms, having a sight-base adapted to be applied to the rear end of the receiver of a firearm, a laterally movable slide mounted upon the rear end of the said sight-base for windage adjustment thereupon, a windage-screw for the windage adjustment of the said slide, an adjustable scale for gaging the windage adjustment of the slide by the said windagescrew, a vertically adjustable peep-sight mounted upon the said slide, an elevationscrew therefor, and an adjustable scale for gaging the adjustment of the said peepsight by the said elevation screw.

2. An adjustable-scale sight for firearms,

having a yoke-shaped sight-base comprising a body and two forwardly extending parallel arms by means of which latter the base is fastened to the rear portion of the receiver of the firearm, a slide mounted for lateral adjustment upon the rear face of the said body of the sight-base, a windage-screw for the windage adjustment of the said slide, an adjustable scale for gaging the windage adjustment of the slide by the said windagescrew, a peep-sight mounted for vertical adjustment upon the rear face of the slide, an elevation-screw therefor, and an adjustable scale for gaging the vertical adjustment of the peep-sight by the elevationscrew.

3. In an adjustable-scale sight for firearms, the combination with a sight-base adapted to be fastened to the'receiver of the arm, of a slide dovetailed upion..the-rear end ofthe said si lifibase for lateral move; ment with respect thereto, a windage-screw connecting the sight-base andslide for the windage adjustment of the latter, an adjustable-scale for gaging the windage adjustment of the slide by the said screw, peep-sight stem dovetailed upon the rear face of the slide for vertical adjustment with the said stem, a nut mounted in the slide and receiving the elevation-screw for the operation thereof, and an adjustable-scale coacting with the said stem for gaging the adjustment of the elevation-screw.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ERIK S. PALMER. Witnesses:

THOMAS C. JOHNSON, FRANK A. PAUL.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washingten, D. 0. 

